Science journalist: Europa, a moon of Jupiter, is covered with ice. Data recently transmitted by a spacecraft strongly suggest that there are oceans of liquid water deep under the ice. Life as we know it could evolve only in the presence of liquid water. Hence, it is likely that at least primitive life has evolved on Europa.
The science journalist’s argument is most vulnerable to criticism on the grounds that it
(A) takes for granted that if a condition would be necessary for the evolution of life as we know it, then such
life could not have evolved anywhere that this condition does not hold - WRONG. Too much confusing. But the highlighted part ruins it. Are we concerned of planet or other heavenly bodies where conditions are not met? No.!!
(B)
fails to address adequately the possibility that there are conditions necessary for the evolution of life in addition to the presence of liquid water - CORRECT.
(C) takes for granted that
life is likely to be present on Europa if, but only if, life evolved on Europa - WRONG. Plain irrelevant.
(D) overlooks the possibility that there could be
unfamiliar forms of life that have evolved without the presence of liquid water - WRONG. Irrelevant.
(E) takes for granted that
no conditions on Europa other than the supposed presence of liquid water could have accounted for the data transmitted by the spacecraft - WRONG. Possibly an assumption but not a weakener.
Additional info strengthens or weakens and this is the perfect example of that.
Answer B.